Function fetch

packages/unpkg-www/src/worker.ts:8–32

(request, env, context)

export default {
  async fetch(request, env, context) {
    try {
      let url = new URL(request.url);
      let shouldUseCache = url.pathname !== "/" && url.pathname !== "/index.html";
      let response = shouldUseCache ? await cache.match(request) : undefined;

      if (!response) {
        response = await handleRequest(request, env, context);

        if (shouldUseCache && request.method === "GET" && response.status === 200 && response.headers.has("Cache-Control")) {
          context.waitUntil(cache.put(request, response.clone()));
        }
      }

      if (request.method === "HEAD") {
        return new Response(null, response);
      }

      return response;
    } catch (error) {
      console.error(error);

      return new Response("Internal Server Error", { status: 500 });
    }
  },
} satisfies ExportedHandler<Env>;